Thanks Tiny, you're absolutely right: the relay switch was still working because I did have the dashboard lights; and the parking light switch on the top of the steering column was just barely engaged, which apparently caused the link to be broken through that circuit. The switch must have been inadvertantly brushed by me or my wife just enough to not be fully engaged or disengaged, if that makes sense. I don't mind looking like an idiot for such a simple solution! Thanks for the reply. I have my running lights back! (If only all problems were fixed this easily....)